Method for preparing organic molecule hybridized TiO2 nanometer composite film on titanium substrate

Abstract

A method for preparing an organic molecule hybridized TiO2 nanometer composite film on a titanium substrate mainly comprises the following steps: A. soaking a pure titanium sheet in a dopamine solution twice, each time for 10-14 hours, to obtain a coating template; B. preparing a mixed solution of gallic acid and hexamethylenediamine, putting the mixed solution in a water bath at 35-39 DEG C, soaking the coating template in the mixed solution for 3-5 hours, taking the coating template out, performing ultrasonic cleaning for three times to obtain an organic molecular layer template; C. mixing a 0.1-0.2 mol/L (NH4)2TiF6 solution and a 0.2-0.4 mol/L H3BO3 solution according to a volume ratio of 1:1 to obtain a mixed liquid; adjusting the pH value to 2.7-2.9; D. soaking the organic molecular layer template in the mixed liquid, and soaking in a water bath pot at 45-55 DEG C for 10-40 hours to obtain the product. The TiO2 film prepared on the titanium substrate by the method has high bonding force, uniform distribution, high photoelectric conversion efficiency, and good biocompatibility.

Description

technical field [0001] The invention relates to the preparation of organic molecular hybrid TiO on a titanium substrate 2 Nanocomposite film method. Background technique [0002] Titanium dioxide (TiO 2 ), as an important wide-bandgap semiconductor material, has unique photoelectric and chemical properties and good biocompatibility. Deposition of TiO on titanium substrate 2 Materials obtained from thin films have been widely used as semiconductor photoelectric conversion materials and biofunctional materials. Deposition of TiO by Liquid Phase Deposition 2 The thin film method has the advantages of simple preparation, few steps, and low requirements for equipment, and has been widely used. However, the existing liquid phase deposition method to prepare TiO 2 Thin film methods, most of which directly deposit TiO on titanium substrates by liquid phase deposition. 2 Thin films, which are oxidized by air on the surface of the titanium substrate and a small amount of uneven...

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Problems solved by technology

However, the existing liquid phase deposition method to prepare TiO 2 Thin film methods, most of which directly deposit TiO on titanium substrates by liquid phase deposition. 2 Thin films, which are oxidized by air on the surface of the titanium substrate and a small amount of unevenly distributed oxides (TiO 2 ) or hydroxyl groups with TiO in the liquid phase 2 Combined and deposited on the titanium substrate; because the surface of the titanium substrate itself is oxidized by air and the TiO in the liquid phase 2 The binding force is poor, the combination is not firm, and its quantity is small and unevenly distributed, so the nucleation and growth rate of the film cannot be well controlled, and the obtained TiO 2 The film is not uniform, the combination is not strong, the quality is not high, and it contains more defect states, such as surface states, local energy levels and impurity levels. It is used for photocatalytic materials, and its photoelectric conversion efficiency is not high enough, and the photocatalytic performance needs to be improved. Improvement; used as biofunctional materials, due to its poor combination with the substrate, less and uneven deposition, TiO 2 The film cannot completely cover the substrate, and the TiO 2 The film falls off quickly, and when applied to the human body, it is exposed or TiO 2 The substrate exposed by the peeling of the film will cause some adverse reactions to the human body, and its biocompatibility needs to be improved

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